Retention belt



FIG. 1 is a top plan view of a retention belt for lumbar treatment, showing my new design, with broken lines indicating stitching;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof, with broken lines indicating stitching;

FIG. 7 is a bottom perspective view thereof, with broken lines indicating stitching; and,

FIG. 8 is a top perspective view thereof, with broken lines indicating stitching. 

The ornamental design for a retention belt for lumbar treatment, as shown and described. 